According to Intertrust, which is partly owned by Sony and Philips, Apple has infringed on 15 of its patents with devices like the iPhone, iPad, Mac, and even iTunes and App Store. The security company's chief executive, Talal Shamoon, has said that "Apple makes many great products that use Intertrust's inventions." He goes on to add "Our patents are foundational to modern internet security and trusted computing and result from years of internal research and development. We find it regrettable that we are forced to seek court assistance to resolve this matter."
It's an interesting fact that in 2004, Intertrust has successfully won $440 million from Microsoft over a similar case.